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Volume 9, Number 9—September 2003

Research

Epidemic and Nonepidemic Multidrug-Resistant Enterococcus faecium

Helen L. Leavis*†, Rob J.L. Willems†, Janetta Top†, Emile Spalburg†, Ellen M. Mascini*, Ad C. Fluit*, Andy Hoepelman*, Albert J. de Neeling†, and Marc J.M. Bonten*Comments to Author 
Author affiliations: *University Medical Center Utrecht, Utrecht, the Netherlands; †National Institute of Public Health and the Environment (RIVM), Bilthoven, the Netherlands

Main Article

Figure 1

Cluster analysis of vancomycin-susceptible Enterococcus faecium (VSEF) isolates originating from clinical infections and clinical and community surveys. VSEF (n=92) were genotyped by amplified fragment length polymorphism (AFLP). Grouping of AFLP patterns showed four different clusters with >65% similarity. Numbers on the horizontal axis indicate percentage similarity. Closed circles indicate presence of the esp gene and the purK-1 allele and also the source of the isolates. Open circles repr

Figure 1. Cluster analysis of vancomycin-susceptible Enterococcus faecium (VSEF) isolates originating from clinical infections and clinical and community surveys. VSEF (n=92) were genotyped by amplified fragment length polymorphism (AFLP). Grouping of AFLP patterns showed four different clusters with >65% similarity. Numbers on the horizontal axis indicate percentage similarity. Closed circles indicate presence of the esp gene and the purK-1 allele and also the source of the isolates. Open circles represent esp-negative strains and other purK alleles. Closed arrowheads indicate ampicillin resistance. The vertical dashed line indicates the level of 65% similarity. Horizontal dashed lines indicate the boundaries of the four different clusters.

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